graph TD
    A[输入图像 1024x1024x3] --> B[Backbone网络]
    B --> C[多尺度特征提取]
    C --> D[Encoder输出]
    D --> E[Decoder模块]
    E --> F[Refiner模块]
    F --> G[输出掩码 1024x1024x1]
    
    subgraph "Backbone网络"
        B --> B1[Conv1]
        B1 --> B2[Conv2]
        B2 --> B3[Conv3]
        B3 --> B4[Conv4]
    end
    
    subgraph "Decoder模块"
        E --> E1[上采样]
        E1 --> E2[特征融合]
        E2 --> E3[卷积处理]
    end
    
    subgraph "Refiner模块"
        F --> F1[精细化处理]
        F1 --> F2[边缘优化]
    end